Nebuleuse de la Lyre, ca. 1885, Albumen silver print from glass negative, Image: 22.8 x 16.4 cm. (9 x 6 7/16 in.), Photographs, Paul Henry (French, 1848–1905), Prosper Henry (French, 1849–1903), Astronomers at the Paris Observatory, brothers Paul and Prosper Henry inherited in 1872 a project begun twenty years earlier--the mapping of the heavens by means of painstaking observation, calculation, and notation
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Nebuleuse de la Lyre, ca, 1885, Albumen silver print, glass negative, Image, 22.8 x 16.4 cm, 9, x 6, 7/16, Photographs, Paul Henry, French, 1848–1905, Prosper, 1849–1903, Astronomers, Paris Observatory, brothers Paul, Henry inherited, 1872, project begun, twenty, years, earlier, mapping, heavens, means, painstaking observation, calculation, notation
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